package com.rookie.session.filter.util;

import javax.servlet.http.HttpServletRequest;

/**
 * @author rookie
 */
public class CommonUtils {

    public static String getIp(HttpServletRequest request) {

        String unknown = "unknown";

        String ip = request.getHeader("X-Real-IP");

        if (ip == null || ip.length() == 0 || unknown.equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }

        if (ip == null || ip.length() == 0 || unknown.equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }

        if (ip == null || ip.length() == 0 || unknown.equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }

        return ip;
    }

}
